From: Srinivas Neeli <srinivas.neeli@xilinx.com>
Date: Tue, 8 Feb 2022 16:20:53 +0000 (+0530)
Subject: can: xilinx_can: Add check for NAPI Poll function
X-Git-Tag: v5.18-rc1~136^2~263^2~24
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2206fcbc1090bdcf7058d8c9bbc1a147c7359cfa;p=thirdparty%2Fkernel%2Flinux.git

can: xilinx_can: Add check for NAPI Poll function

Add check for NAPI poll function to avoid enabling interrupts
with out completing the NAPI call.

Link: https://lore.kernel.org/all/20220208162053.39896-1-srinivas.neeli@xilinx.com
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---

diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index 1674b561c9a26..e562c5ab1149a 100644
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -1215,10 +1215,11 @@ static int xcan_rx_poll(struct napi_struct *napi, int quota)
 	}
 
 	if (work_done < quota) {
-		napi_complete_done(napi, work_done);
-		ier = priv->read_reg(priv, XCAN_IER_OFFSET);
-		ier |= xcan_rx_int_mask(priv);
-		priv->write_reg(priv, XCAN_IER_OFFSET, ier);
+		if (napi_complete_done(napi, work_done)) {
+			ier = priv->read_reg(priv, XCAN_IER_OFFSET);
+			ier |= xcan_rx_int_mask(priv);
+			priv->write_reg(priv, XCAN_IER_OFFSET, ier);
+		}
 	}
 	return work_done;
 }